var speed=15//速度数值越大速度越慢
var HPic2=document.getElementById("HPic2");
var HPic1=document.getElementById("HPic1");
var HPic=document.getElementById("HPic");
HPic2.innerHTML=HPic1.innerHTML
function Marquee3(){
if(HPic2.offsetWidth-HPic.scrollLeft<=0)//offsetWidth 是对象的可见宽度
HPic.scrollLeft-=HPic1.offsetWidth//scrollWidth 是对象的实际内容的宽，不包边线宽度
else{
HPic.scrollLeft++
}
}
var MyMar3=setInterval(Marquee3,speed)
HPic.onmouseover=function() {clearInterval(MyMar3)}
HPic.onmouseout=function() {MyMar3=setInterval(Marquee3,speed)}